Concentrator.



' causing the'jdernagnetization:and rem'zagnetiv To alli t l of ftheUnitedV States; `residirl'g et Lebanon, in l theyj; eountjfV of" Leb anon; lStatief of Pennsyll wenig-lierre linvented Certain new,y and l usefuly Improvements in-Co'ncentrators, of which the Figure l1 isepln View; I 2`is si'lonfgi-k zationo'f,thejrnagnetg' f 3o l l I: v'transverse"tothetof the Inovenientsofsaidf thereby 'This invntionfhasfor'itslobjeet",the-prof `duction of an improvedineens'endapparatus f for separating' magnetizalblefperticles,III ores; 'v 'i suehas iron-'ores'or other 'suitable 'mteriahf j ffrom the non-magnetizableparticles;

- The invention ycomprises, inf''cc'nnbi'netiom 'a suitable 'table u', series of electroniagnetslfr Ineens@for v`i1"nfuauting reci rocatory "moyev'mentslto,Ifthe'latteigIneensfp .f the .Inagnetset or near thee in r'w'drio; end mans .tending to] barry Y Offv thematerial upon the table ine` direction magnets; the construction being sueh'es here-p fine' ter described-5 ,Wherebythermagnetizeble v-pziartieles v,ofjore vsuitably depositedfonv vsaid table rvare1clalvisedfL to 'be carried vsierossV ,thev

samefpartl thinueneeof the magnetsy y'momentum; s step-'by-'step f 'Thefiirentiorielsfo comprises 'certain nofel features f and' combinations tifiuleilyid@critedild1Peil@v 7| which is that'shown `iny the eeeompanying the inclined table `of said 'eoncentraton `which is slidable'y lengthwisein' suitableguidewaixs'y i, e

nected lrod i5r with ianilarin, 6, depending or denigtgIIPX/CZingr4 f iid' of. their strokel hereinitfter'i'parvf said tothereeroferni 6', QI 'y end of which springbears againstthe latter f andlit'sotherendjegainstaollar 8:2011 .theff C rod. Thsvrod passesthrougha ,holerinerm-i 6o p 6, sindv therezis @spring 9 of lessresistance, orl v 'power than the spring 7 uponthe projecting" i y against @collar 1 0 on ther rodi. Alongfthe,6,5

u* per or highledgeofthe table-V1 are 'sprinl; ers llwithwhich oonnectrpipes. 12,;thatf` f veomrnuneetewithfaisource of Water-supply-, When the apparatusis insoperatiomtthe fore or ore-pulp lsjeontinually deposited upon 'theig7o table neery the rear,l upper cornerfthereoffvrand i the water'is, allowed:toifloW2 through the ff-" 'sprinklers down over theteble.y The'JmanL; l nerwof'operation of, the said apparatusis well fkIlOW'n, theniateriel being earried-forwairdg75 by each forward reciprocation ofthe :table 1 andtheheavierof thepartieles throWnifari ,ther forward through their. momentumby the sudden burnp-of Ithe table-occurring ati-ff heavier" thelpartieles the-.farther firten-V Y Inf erfarrying out vmy inventionlsecurel 'to' I 1 Y' theunderside ofthe tftbleA 1 fa series-or row,ofL-f 4 Y eleetromagnets l13,/the first of whiehiis'lat e185 pointbelowthe plaeef-jtheupper'rearCorner g i lA of v.thetablewherethe'oI'e-pulpor otl 1e1""i gl rn'aterialfto be treatedl is deposited. :The yupper 4oles 'i of the magnets.

y are fadjacentto thezsur ace of the tablefand their lower: poles 9 arepreferably lconnected bye `bar 14, that '1s y.

secured to the table andhold s'themagnets in n vv*comniutatorris suitably {connecte'dbyg-i'con-95 .ductor- Wires (notlshown)- with1 thejmegnets 'f /l'endfwith y@sourcey of eletrieel`V` energylg i -This eornrnutatoris adapted .to izeusethedef -l magnetizationof the magnets atthe end: of

madezaboutfour-fifths -offitsiull for-*wardfv L stroke. @OtherWisestated',l the, eurrentis fil-,.111 if IloWedfto-been during, sny,forty'per. Vcnertit.- of 195 s Yeach reirolution olf'fthe'fsh'aft 3end.'theeomf-v y n. ,mutator'and eightypereent ofr the lforward*I '-1 .f wj x'movem'entof thetable. i 'f l Themode ofoperationy of thestppjaratus as follows: The ore-pulpdeposited uponthe -I O treble at Ades'cending by gravlty, coinesintotheildf Off attraction` ofthe first magnetfof f the series. -At the forward reciprocation of the table the magnetizable particles ofthe ore, `held vby attraction of tie magnet, are carried along positively until they suddenly cease t-o be attracted-that is, until the commutator causes the demagnetization of the magnet-whereupon the immediate stopping and liolt of the table liust prior to the beginning of the return movement causes the released ore particles to move forward as projjectiles by their momentum into what in a. `momentbecomes the field of attraction of the. next or second magnet-thatis, when the table has reached the end of its return stroke. On the next forward movement of the table Vthese particles will be carried forward by the last-mentioned magnet and in like manner into the field. of attraction of the third magnet, and so onifrom one magnet to the next until they leave the last magnet of the series (when the latter is demagnetized) and de- `scendingtl'i'etable vare allowed to fall into a suitable receptacle. The silicious or earthy andfother non-magnetizable matter is washed downand off thetable by thelbody of Water flowing from the sprinklers. In order to catchthe magnetizable' particles that may not happen to-be caught or held by the said seriesl ol magnets, I would sometimes employ a second 'row or series of like magnets (marked 13a) `below thefirst series, as seen in Fig. Sand indicated'by dotted lines in Fig. 1, thefm'agnets-of said second series alternating lwith those of the-first series, as indicated in Fig. 1. If necessary, there may be another likeI alternating series ofmagnets below the preceding ones.

A body of Water owing over the table may be dispensed lwith and gravity alone be reliedupon to carry the separated ore from ythe4 table.

`Other modifications ofthe ap aratus may Vbeempllo ed in carrying out t e invention without'dleparting from the essential principles thereof-to wit, the separation of the magnetizable particles of ore by the successivemagnetization and demagnetization of a series ofreciprocating magnets and the mo- 4d'emagnetizing said magnet at or near the end of itsstrokein` one direction, and means tending to carry off the material deposited on the `support in a direction transverse to that of the movement of said magnet, whereby the magnetizable particles of material deposited yonsaid ysupport lare caused' tobe transported across said support partially by being carried by said magnet in its forward stroke, and partially by momentum after being released therefrom, substantially as set forth.

2. In a magnetic separator, the combination of a support for the material to be treat.- ed, a magnet adjacent thereto, a second magnet below the first magnet and in advance of the latter, means for imparting simultaneous reci rocations thereto, means for simultaneous y demagnetizing said magnets at or near the end of their stroke 1n one direction, together with means tending to carry off material deposited upon said support in a direction transverse to that of the movement of said magnets, substantially as set forth.

3. In an ore-separating a paratus, the combination of a suitable tab e, a series of eleetromagnets, means for imparting simultaneously thereto reciprocatory movements, means for demagnetization of said magnets at or near the end of their stroke in one direction and means tending to carry off the material deposited on the table in a direction transverse to that of the movement of said magnets, whereby themagnetizable articles of material deposited on said tab e are caused to be transported across said table by a succession of impulses, substantially as set forth.

4. In an ore-separating apparatus, the combination of a table, a series of electro magnets adjacent to the surface thereof, means for imparting simultaneous reciprocations thereto, a second series of similar magnets below the first series and alternating with the latter, and means for simultaneously demagnetizing said series of magnets at or near the end of their stroke or movement in one direction, substantially as and for the purpose set forth.

5. In an ore-separating apparatus, the combination of an inclined table, a series of electromagnets movable therewith, means for imparting lengthwise reciprocatory movements to said table, and means for demagnetizing said magnets at or near the end of the stroke in one direction thereof, together with means for causing water to flow transversely over and upon the top of said table, the construction being such that the magnetizable particles of material deposited on said table will be transported across the latter athwart the water by a step-by-step movement, partly by influence of said magnets and partly by momentum., substantially as set fort In testimony whereof I have hereunto affixed my signature this 20th day of February, A. D. 1904.

QUINCY BENT. Witnesses:

IRA K. DUTWEILER, H. G. UMBERGER.

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